Dellah was mostly covered by temperate oceans and dotted with islands. Its largest body of water, the Silvasic Sea, took up most of the temperate zone (between 23.5°S and 66.5°S) in Dellah's southern hemisphere. (PROSE: Dry Pilgrimage) A day on Dellah was 26 hours long. (PROSE: Mean Streets)

The Marek Dha landmass and an associated island chain, called the Marek Dha islands. These islands, many of them private, were dotted with luxurious homes for the very very wealthy, such as industrialist Marcus Krytell. (PROSE: Ship of Fools)